1. Compute SHA-256 of OTSCanonicalRecord value → must equal OTSHash 2. Open OTSProofURL → extract Bitcoin block number → must equal OTSBitcoinBlock 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Read CopyrightID inside OTSCanonicalRecord → must equal the CopyrightID above 5. GET OTSVerificationAPI → pre-computed 6-check result from server 6. If all match: this entity was registered on CopyrightChains at OTSTimestamp, independently verifiable on Bitcoin Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x785531346dc6d0e6b3653095d19cc26744013c4be51558f271445d17d034c689. Chain 2 (Bitcoin): anchored in block 953657 (2026-06-14T16:43:25Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/50fc1653-3940-41c8-aa3f-37afbc640692.json and https://artists.proofprofile.net/proofs/artist/50fc1653-3940-41c8-aa3f-37afbc640692.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Mimi & Lisa (Original Video Game Soundtrack)
Assassin's Creed Codename Hexe (Concept Soundtrack)
Jotunnslayer: Hordes of Hel (Original Game Soundtrack)
1. Confirm isrcCode identifies the recording in the pre-2022 source corpus and cc-db-prod record 2. GET OTSVerificationAPI → server-side canonical-record, hash, and attestation checks must pass 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Confirm CopyrightID is the CopyrightChains transaction hash 5. If all match: the cc-db-prod record is independently anchored on Bitcoin at OTSTimestamp Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x20e72193626866f1a8ceb2975752cae2ea1ad1abf3a857bcca8f545073c23d05. Chain 2 (Bitcoin): anchored in block 959087 (2026-07-22T02:05:55Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZNWW2537772.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfada6623b3649b447d0a9e05144a9e78367031938fd4aeed0f8e0f9f548b4d21. Chain 2 (Bitcoin): anchored in block 958908 (2026-07-20T16:28:12Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZNWW2537774.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb5fa6b7163c60896dc9ae9d029c5ab21a94729f609280013cfbbd55b5d7416f. Chain 2 (Bitcoin): anchored in block 959084 (2026-07-22T00:50:00Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZNWW2537775.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe46c64b56e3a3be7b5e78136d9ba71b8c85e45ce634aceff792c282a44bd7156. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZNWW2537777.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2fea61b64bb32f44152a0b803a0a48feb61c15cf2e0e7b98b9dea613ec312775. Chain 2 (Bitcoin): anchored in block 958805 (2026-07-20T02:22:58Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZNWW2537778.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x80cb6788ec28666d5ed9687df166dfc07432f4a1e35eedd69e87358cf0f0109f. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZNWW2537779.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d777a7ad69e30d48d132a6778cc1ae241c499a6451b11e387679a9b1699d8b6. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZMER2298385.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8948284949060014d14ce7652cdd4e777ec2c7d5b11a582b51daf09f36d0f443. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZMEN2334280.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0506a896e52a872b2fbe62abce474cdb17fd7f2d5b44730a873c7a26932fc2a0. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZK6H2418036.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x99a72989a103275de09566bbe9683df01e0605caba814098481bd85d5c56ee58. Chain 2 (Bitcoin): anchored in block 960348 (2026-07-31T05:17:02Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZDA52306857.